Oh man

I'm frustrated.

I have a problem just running the hello world!!

man...

i can't solve the problem

i just copy pasted all the files, but still not working!!

index.html
Code:
<!DOCTYPE html>
<html>
	<head>
		<meta http-equiv="Content-Type" content="text/html;
		charset=utf-8">
		<title>TouchStart Application – My Sample App</title>
		<!-- Sencha Touch CSS -->
		<link rel="stylesheet" href="lib/resources/css/sencha-touch.css"
		type="text/css">
		<!-- Sencha Touch JS -->
		<script type="text/javascript" src="lib/sencha-touch-debug.js">
		</script>
		<!-- Application JS -->
		<script type="text/javascript" src="app/TouchStart.js">
		</script>
		<!-- Custom CSS -->
		<link rel="stylesheet" href="css/TouchStart.css" type="text/css">
	</head>
	<body></body>
</html>
TouchStart.js
Code:
Ext.application({
	name : 'TouchStart',
	launch : function() { 
		var hello = new Ext.Container({
			fullscreen : true,
			html : '<div id="hello">Hello World</div>'
		});
		this.viewport = hello;
	}
});
and the error msg is this